共查询到19条相似文献,搜索用时 62 毫秒
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介绍了燃煤锅炉空气分级、燃料分级、低氮燃烧器、选择性催化还原以及双尺度低NOx燃烧技术等NOx排放控制技术的基本原理和特点,并结合某300MW燃煤锅炉具体情况,通过对几种技术在NOx脱除率、投资和运行费用等方面进行分析比较,得出双尺度低NOx燃烧技术是该锅炉一种合理、高效、经济的NOx排放控制技术。 相似文献
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与焦炭竖窑相比,气烧石灰竖窑具有窑内气流量大、石灰活性度高、室内温度均匀、温度易控制、对燃气选择要求不高、热耗高等特点。济钢对气烧石灰窑进行改进,将圆柱型窑形改为矩形+弓形,并重新设计了出灰机结构,在除尘烟道上串联增设了空气、煤气换热器,使石灰的生、过烧率低于7%,减少了出灰机的断齿、断轴现象,而且节约了煤气。 相似文献
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Hazard control of NOxis very important for the long life of hot stove shell and environmental protection.NOxconcentrations during different operation periods of hot stove were calculated according to thermodynamical and dynamical analyses.The results were verified by the previously measured data.Then,the influence of hot stove operation parameters on NOxconcentration and the mechanism of liquid water formation in hot stove were studied.The results indicated that in gas period,the dome temperature should be controlled below 1 420 ℃in order to decrease NOxemission.In the case of banking operation,NOxconcentration was about 40-60times higher than that in gas period.Hence,reasonable measures should be taken to reduce banking operation,especially in the situation of large excess air ratio.Since NOxformed during the whole operation process,the most effective way of preventing liquid water and HNO3generation is to control the pipe and shell temperature,which should be higher than the condensation temperature of water vapour.The condensation temperature should be considered as the design temperature of pipe and shell for hot stove. 相似文献
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对济钢开发的新型顶燃式热风炉进行了详细介绍,该炉具有整体结构稳定,风温高,操作安全的特点,适合热风炉新建或改造。 相似文献
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介绍了富氧燃烧技术的基本特性,根据富氧燃烧特性,分析了热风炉采用高炉煤气时的富氧混合操作、空燃比设定、废气和拱顶温度的变化及其运行效果,提出了富氧燃烧适宜的条件。 相似文献
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简要介绍了预热式天然气热风炉[1]替代原有燃煤热风炉,在铜精矿预干燥生产中的应用。阐述了燃煤热风炉和预热式天然气热风炉各自的工作原理,并重点阐述了预热式天然气热风炉系统结构和规范操作流程。同时,对预热式天然气热风炉替代燃煤热风炉的使用情况进行了总结和分析,并提出了推广改进意见。 相似文献